Follow these easy steps to create the amazing Triple Lemon Meringue Cheesecake:

For the Cheesecake Layer:

1. Preheat your oven to 325°F (160°C). Grease a 9-inch springform pan.
2. In a large mixing bowl, beat the cream cheese until smooth.
3. Gradually add the sugar, mixing until creamy.
4. Blend in the vanilla extract, lemon zest, and sour cream until well combined.
5. Add the eggs, one at a time, mixing just until incorporated.
6. Sprinkle in the flour and mix gently until smooth.
7. Pour the cheesecake batter into the prepared springform pan.
8. Bake for 45-50 minutes, or until the center is set but slightly jiggly.
9. Turn off the oven and allow the cheesecake to cool inside for 30 minutes.

For the Lemon Curd Layer:

10. In a saucepan, whisk together the lemon juice, sugar, eggs, and lemon zest until combined.
11. Over medium heat, cook the mixture until it thickens, stirring constantly.
12. Remove from heat and whisk in the butter until smooth.
13. Pour the lemon curd over the cooled cheesecake layer, spreading evenly.
14. Refrigerate for at least 1 hour to allow the curd to set.

For the Meringue Topping:

15. In a mixing bowl, beat the egg whites and cream of tartar until soft peaks form.
16. Gradually add the sugar, continuing to beat until stiff peaks form.
17. Spread the meringue over the lemon curd layer, ensuring it touches the edges to prevent shrinking.
18. Use a spatula to create peaks and swirls for texture.
19. Bake on a lower oven rack at 350°F (175°C) for 8-10 minutes, just until the meringue is golden.

Final Steps:

20. Allow the cheesecake to cool completely before transferring to the refrigerator. Chill for at least 4 hours, or overnight for best results.
21. Carefully remove the sides of the springform pan.
22. Slice and serve with additional lemon zest if desired.

Now you have successfully crafted a decadent Triple Lemon Meringue Cheesecake!